Standard 3 Card Monte
You want to carry this one around with you.
Although it doesn't come with instructions, you will immediately see what to do!
You show them the 3 cards and ask an audience member to remember and take the middle card which they do.
When they turn it over it's blank.
I supply 5 blank cards (which you can write your own message on) and a 'Wrong Again' card which is blue backed. All cards supplied are Bicycle Cards of course.
You have a a great routine here and it's all small enough to carry around with you in the wallet supplied!